plot opearting point in extracted simulations

[nannapaneni]

Hi all,

In my schematic there is transistor MP3 at hierarchy DCDCDAC_0/dac_sl/I43 level.
To plot operating point drain current in this transistor I am using expression OP("/DCDCDAC_0/dac_sl/I43/MP3","ids").
Till now it was fine.

For post layout(extraction) simulation there was no hierarcy because it was flattened and tried to use same expression to plot drain current in MP3. But I was failed.

Can anyone help me what expression I should use to plot current in MP3?????

All simulations I am doing in GUI.

Thanks in advance for help.

 

[erikl]

In extracted layout select the transistor corresponding to MP3 and see its properties ("q" in Cādence tools). So you should be able to print its drain current.

 

[nannapaneni]

i am looking for genearl solution, which is applicable for big designs also

 

[erikl]

You didn't tell which extraction nor LVS tool you're using. Usually LVS tools generate cross-ref (correspondence) lists for nets and devices. This is a feature which can be enabled (or not), see e.g. (Cādence si):

si: simSetDef().... [COLOR="#FF0000"]createXref is initialized to "nil"[/COLOR].
si: simSetDef().... useLastBinaryXrefTable is initialized to "nil".
createXref useLastBinaryXrefTable disableLikeMatch disableRewire layoutRundir
[COLOR="#FF0000"]correspondenceFile createXref[/COLOR] disableRewire useFileCorrespondence
"layout/map/current~" "layout/termbad.out" "layout/netxref.out"
"layout/devxref.out" "layout/prunedev.out" "layout/prunenet.out"
"schematic/termbad.out" [COLOR="#FF0000"]"schematic/netxref.out" "schematic/devxref.out"[/COLOR]
"schematic/ovfldev.out" "schematic/ovflnet.out" "lvs.cpoint" "si.out" "xref.out"
si: simSetDef().... createXref is initialized to "nil".
si: simSetDef().... useLastBinaryXrefTable is initialized to "nil".